🧛 Vampire Apocalypse Calculator
A just-for-fun calculator that estimates how quickly a fictional vampire outbreak could spread, using simple exponential growth math.
What this calculator does
This is a lighthearted, fictional calculator for entertainment purposes only — it is not a real epidemiological or scientific model of any actual disease. It simply applies basic exponential growth math to a fun vampire-outbreak scenario.
The math behind it
It uses the same doubling-style exponential growth formula used across biology and finance: V(t) = V0 × (1 + r)^t, where V0 is the starting number of vampires, r is the average number of new vampires each existing vampire creates per night, and t is the number of nights elapsed. The result is capped at the total human population, and the calculator also estimates roughly how many nights it would take to convert everyone, using V0 × (1+r)^t = P solved for t.
Real infectious-disease spread is far more complex (it depends on immunity, behavior change, geography, and many other factors) — this tool is purely for fun, to illustrate how fast exponential growth can compound.